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Table 1 International League of Associations for Rheumatology criteria for enthesitis-related arthritis

From: Multicenter inception cohort of enthesitis-related arthritis: variation in disease characteristics and treatment approaches

Inclusion criteria Exclusion criteria
Arthritis and enthesitis ▪ Psoriasis or a history of psoriasis in the patient or a first degree relative
or ▪ Presence of IgM RF on at least two occasions at least 3 months apart
Arthritis or enthesitis with at least two of the following: ▪ Systemic JIA in the patient
▪ Sacroiliac joint tenderness and/or inflammatory spinal pain
▪ Presence of HLA-B27
▪ Onset of arthritis in a male over 6 years of age
▪ Family history in at least one first degree relative of ankylosing spondylitis, ERA, sacroiliitis with IBD, reactive arthritis or acute anterior uveitis
▪ Acute anterior uveitis
 
  1. Abbreviations: ERA Enthesitis-related arthritis, HLA Human leukocyte antigen, IBD Inflammatory bowel disease, IgM Immunoglobulin M, RF Rheumatoid factor, JIA Juvenile idiopathic arthritis